Issue in previewing PDF in a Container field

We have an issue in container fields when previewing the Pdf file. Image files are displayed via container fields. But when we try to view PDF it cannot display and we get the following error message . " This Page can't be displayed . Make sure the web address http://203.125.140.141 is correct . Look for the page with your search engine . Refresh the page in a few minutes ".

It could be a port issue. Some versions of FileMaker Server require port 16000 to be open to view interactive container field data. Consult the port list for your version and ensure their open and the client device can see them.